公开(公告)号：US20220294896A1

公开(公告)日：2022-09-15

申请号：US17636792

申请日：2020-08-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fusheng LI ,  Shengfeng ZHOU ,  Yi YU ,  Wei YUAN

IPC: H04M1/72484 ,  H04M1/72409 ,  H04M1/60

Abstract: Embodiments of this application disclose a call method and an apparatus. In the call method, when a user does not actively select an audio device as a voice pickup device and a voice play device, after establishing a call connection to another electronic device, an electronic device selects, from available audio devices, an audio device that meets a user expectation as the voice pickup device and the voice play device. According to technical solutions provided in the embodiments of this application, user experience in a call process can be improved.

公开(公告)号：US20200014418A1

公开(公告)日：2020-01-09

申请号：US16564022

申请日：2019-09-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yi YU ,  Yuanda HUANG ,  Liangchuan LI

IPC: H04B1/69 ,  H04J14/02 ,  H04B10/54 ,  H04B10/61 ,  H04J13/10

Abstract: Embodiments described and shown provide a signal transmission method, a signal receiving method, a related device, and a system. The signal transmission method includes: generating a single-wavelength optical carrier; splitting the single-wavelength optical carrier into N subcarriers having a same wavelength; generating a spreading code corresponding to each of the subcarriers to obtain N spreading codes, where a bandwidth of each of the spreading codes is less than or equal to a preset threshold; deserializing a to-be-transmitted data signal into N sub-data signals; modulating the N subcarriers based on the N sub-data signals and the N spreading codes, to obtain N modulation signals; and combining the N modulation signals into one combined signal, and outputting the combined signal.

公开(公告)号：US20200186255A1

公开(公告)日：2020-06-11

申请号：US16791381

申请日：2020-02-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yi YU ,  Yuanda HUANG ,  Liangchuan LI ,  Xie WANG

IPC: H04B10/556 ,  H04B10/61 ,  H04J14/00 ,  H04B1/707

Abstract: An optical transmitter, an optical receiver, and an optical transmission method are disclosed. The optical transmitter includes an optical signal generator, N spreaders, N pairs of data modulators, and a combiner, where the optical signal generator generates N optical carriers; an ith spreader spreads an ith optical carrier, to obtain a spread optical signal having two subcarriers; splits the spread optical signal into a first optical signal and a second optical signal; and delays the second optical signal to obtain a third optical signal; an ith pair of data modulators modulate the first optical signal and the third optical signal to obtain a pair of modulated optical signals, transmit the pair of modulated optical signals to the combiner, where the pair of modulated optical signals reaching the combiner differ by 1/(4 fsi) in time domain; and the combiner combines, into one optical signal, N pairs of modulated optical signals.